Dataset
NSW Department of Climate Change, Energy, the Environment and Water
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Spatial Layer of HEVAE Vegetation Groundwater Dependent Ecosystems Value in NSW

NSW DoI Water has adopted the Guidelines for Identifying High Ecological Value Aquatic Ecosystems (HEVAE) framework developed by the Australian Commonwealth Government. In the current assessment for NSW, the HEVAE consists of four key criteria which include diversity, distinctiveness, naturalness and vital habitat. Therefore, the HEVAE vegetation GDE value layer is a combination of four individual criterion layers. The final or overall HEVAE score was determined for vegetation PCT polygons which has a high probability of being groundwater dependent. This was calculated by adding together the final scores for each criterion (Naturalness, Diversity, Distinctiveness and Vital Habitat). This score was then standardised by dividing by the maximum combined HEVAE score for a whole catchment’s vegetation GDE polygons to provide an even spread of score outcomes between 0 (lowest) and 1 (highest). For ease of data modelling and management, the dataset was divided into the following catchment management areas; Border Rivers-Gwydir, Central Tablelands, Central West, Hawkesbury-Nepean, Hunter-Central Rivers, Lachlan, Lower Murray Darling, Murray, Murrumbidgee, Namoi, Northern Rivers, Southern Rivers, Southern Tablelands, Sydney Metro and Western Division (MDB and far west subdivided further into the IBRA Sub regions).

Data and Resources

Metadata Summary What is metadata?

Field Value
Language English
Alternative Title GDE HEVAE
Edition v1
Purpose Environmental management
Frequency of change Unknown
Keywords VEGETATION,WATER-Groundwater
Metadata Date 2018-02-21
Date of Asset Creation 2018-02-21
License Creative Commons Attribution 4.0
Equivalent Scale 25000
Vector representation
Record 1
Object type
Curve
Object count
Geospatial Topic Environment
Extent

Dataset extent
Temporal Coverage From 2018-06-01
Datum GDA94 Geographic (Lat\Long)
Legal Disclaimer Read
Attribution NSW Department of Climate Change, Energy, the Environment and Water asserts the right to be attributed as author of the original material in the following manner: "© State Government of NSW and NSW Department of Climate Change, Energy, the Environment and Water 2025"
Groups Department of Planning and Environment—Water
DOI doi:10.25948/y133-6t58
DOI Creator name Dabovic, Jodie; Dobbs, Lucy; Byrne, Glenn; Raine, Allan
DOI Resource Type Assigned Ecological Value to Vegetation and Wetland Groundwater Dependent Ecosystems
DOI Resource Type General Description Dataset